New subject: [Bug 58013] My "IsSingleInstance" .NET-app crashes on second attempt to start

23 Mar 2025

      https://bugs.winehq.org/show_bug.cgi?id=58013

            Bug ID: 58013
           Summary: My "IsSingleInstance" .NET-app crashes on second
                    attempt to start
           Product: Wine
           Version: 10.4
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: -unknown
          Assignee: wine-bugs(a)winehq.org
          Reporter: andreas.franz(a)arcor.de
      Distribution: ---

Using of "IsSingleInstance" from Microsoft.VisualBasic.ApplicationServices
produce a crash on second attempt to start this app.
I've converted VB.Net-Apps to C# - on real Windows, this setting still works
fine.
On WineHQ it produces:

Unhandled Exception:
Microsoft.VisualBasic.ApplicationServices.CantStartSingleInstanceException:
This single-instance application could not connect to the original instance.
   at
Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.Run(String[]
commandLine)
   at Grid.My.MyApplication.Main(String[] Args) in
G:\NET-Programme\Sourcen\C#\Terminplan\My
Project\MyNamespace.Static.1.Designer.cs:line 118
wine: Unhandled exception 0xe0434352 in thread 4ac at address 7B646E97 (thread
04ac), starting debugger...

regards, Andy

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[Bug 58013] New: My "IsSingleInstance" .NET-app crashes on second attempt to start

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